sipario 0.3.0

• Fixed: the docked notes announced themselves as a window. Whether
  the page is the dock's frame was decided after the first hello went
  out, so a deck with popups allowed opened a blank window by name and
  hid the dock. It is decided first now.
• Fixed: the version cache missed the deck page. Only the notes page
  went through it, so notes opened after a held save asked for a version
  the server had never kept and got the latest instead. The deck page is
  served through the cache too.
• Fixed: notes opened after a save the deck was holding back showed
  the file's latest, not the room's. The page now says which version it
  was rendered at, the notes take their version from that, and a deck
  reporting an earlier version is asked for by number: the server keeps
  its last few renders and serves the one the room is seeing.
• Fixed: a rename while the deck was in fullscreen left the notes
  stationary. Staging the renamed page closed the old channel, which the
  fullscreen deck was still driving on. The new channel is now opened
  beside the old as a probe, and the notes move over only when a deck
  there confirms the staged version.
• Fixed: a rename could still lose the detached window. The renamed
  deck's roll-call went unanswered when it loaded before its window had
  moved channel. A window of its own now says so in its hello, and a deck
  takes it back on either message, whichever comes first.
• Fixed: the notes ran ahead of a deck in fullscreen. The deck holds a
  save back while it is full screen; the notes took it at once, and read
  the script of a slide the room could not see. The deck now reports the
  version it is showing with every position, and the notes stage a fresh
  page until the deck reaches it. Leaving fullscreen takes the held save
  rather than dropping it.
• Fixed: renaming a deck cut its notes off. The channel is named for
  the deck, so the reloaded deck spoke on a channel the notes were not
  on. A refreshed notes window now moves to the channel the fresh page
  names, and the tab id and window name no longer carry the deck's name,
  so the pairing and the reclaim survive the rename.
• Fixed: a stylesheet added by a save was appended after the rest in
  the notes, so two sheets of equal specificity could resolve the other
  way round from the deck. Sheets are now placed in the fresh page's order.
• Fixed: a save that did not render stranded a detached notes window.
  The window reloaded into the server's error, a plain page with no
  listener, so the save that fixed the deck never reached it. The error
  is now shown inside the notes, over the script, with the previews and
  the clock left as the last good copy, and the stream stays connected.
• Fixed: a refreshed notes window kept its old stylesheets. The deck
  was swapped in but the sheets were not, so a dress edited mid-rehearsal
  left the previews in the old look. The sheets the fresh page carries are
  fetched again, one it gained is added, one it dropped goes.
• Fixed: reloading the deck lost its detached window. The window stayed
  open but the deck came back with no handle to it and believed the notes
  hidden, so P docked a second copy beside the deck: the script on the
  shared screen. A reloaded deck now asks over the channel whether its
  window is still there and, when it answers, takes it back by name.
• Fixed: a deck with a fault in it took the server down at startup.
  The listening callback rendered once for the banner and a render error
  there was thrown out of the process, so the error page that exists for
  exactly this state was never served. The failure is now logged and the
  server stays up, serving the error until the next save.
• Fixed: the error page reloaded itself for ever. The reload stream
  sends its current token on connect and the page reloaded on every
  message, that one included: connect, token, reload, connect. It now
  keeps the first token and reloads only when a later one differs.
• Fixed: an edited layered figure never reached the deck. The figure
  cache was keyed by path and never emptied, so a save of an SVG reloaded
  the page and the render was handed the old drawing for as long as the
  server ran. The cache now checks the file's mtime on every read and
  rereads a changed figure; an unchanged one is still served from memory.
• Fixed: a detached notes window went stale after a save. It kept the
  copy of the deck it loaded with and took only positions from the deck,
  so after an edit every move landed on the right number and the wrong
  script. It now listens for the same change the deck does, fetches its
  page again and swaps the fresh deck in without reloading, so the clock
  keeps running and the window stays put. The docked panel already
  reloaded with the deck, being its iframe.
• Added: number-from: 0 in the deck's head counts the movements from
  0 instead of 1. A talk whose first movement is an opening rather than a
  beat had its beats one off from its slide numbers: beat three's section
  slide, marked 3, was 4.1. The renderer, the id prefixes and renumber
  all follow the key; anything but 0 or 1 stops the render.
• Added: the notes carry the map, top right, lit where the deck is.
  The position block was dropped from the notes earlier on the grounds
  that the deck's compass and minimap carry it; that put it on the screen
  behind the presenter, and turning round to find your place is what a
  notes panel is for. Same shape as the deck's minimap, built from the
  same groups. M, pressed on the deck or in the notes, shows or hides both.
• Added: Shift with the up arrow returns to the head of the movement
  you are in, from the deck or from the notes. Up alone reads back a step
  at a time and left returns to wherever the previous movement was left,
  so there was no way to restart the current one short of pressing up
  until it stopped. The help overlay and the starters' keys slide list it.
• Fixed: the notes now follow the deck window that opened them. The
  channel is named for the talk, which keeps two different decks apart but
  not two windows of the same one, and opening a deck twice is ordinary —
  one on the projector, one on the laptop. Every deck window was
  broadcasting its position to every panel, and each panel obeyed whichever
  spoke last, so the notes beside a deck on slide 1.1 could be reading the
  script for 2.3. Each window now carries an id, kept in sessionStorage
  so it survives the live reload, and a panel listens only to the window
  that opened it. A detached window also gets a name of its own, so a
  second deck's detach opens its own window instead of reusing the first's.
  A panel opened by hand at /presenter carries no id and still follows
  any deck, which is the only useful thing it can do.
• The next slide sits under the current one. The two previews are one
  narrow column with the clock and the position beside them, and the
  script runs the whole width underneath. Before, the previews sat apart,
  one across the top and one down the side, which set the panel's width by
  the wider of two pictures of slides the presenter has already seen.
  Nothing about the layout is decided by width, so docked and detached
  stay one arrangement.
• The script can be made bigger or smaller, with + and
  - or the two signs beside its heading, in seven steps from
  15px to 35px. How far a lectern is from the eyes is a property of the
  room rather than of the talk, so it is set in the room and remembered
  per deck. The ends of the range say so rather than letting a press do
  nothing.
• The keys the notes own, 1, 2, + and
  -, work from the deck window too: docked, the notes are an
  iframe and the hands are on the deck. A detached window hears them
  itself and is not sent a second copy.
• The next slide's heading is gone from under its preview. The preview
  is the slide, so the heading said the same thing twice in the panel
  whose other half is the words to be read. The end of the talk says
  itself: the box is empty.
• The position is gone from the notes: no movement name, no slide
  number, no dot per step. The deck's own compass and minimap carry it,
  on the screen the presenter is already looking at, and this panel is
  for the words. What is left beside the previews is the clock.
• Either preview can be put away, by the eye beside its label or by
  1 and 2, and the choice is remembered per deck.
  With both away the rail shrinks to the clock and the script takes the
  rest. The label stays whatever is hidden, so the way back is where the
  way out was, and the eye is struck through rather than unlit, so which
  state it is in can be read rather than inferred.